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时间:2020-03-24
《临清坳陷晚古生代煤成气储层沉积学特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第38卷第4期煤田地质与勘探Vb1.38NO.42010年8月CoALGE0LOGY&E=5a)IDR舯NAug.2010文章编号:1001.1986(2010)04.0007.05临清坳陷晚古生代煤成气储层沉积学特征韩美莲,吕大炜,王芳,贾强(1.山东科技大学泰山科技学院,山东泰安271019;2.山东科技大学地质科学与工程学院,山东青岛266510)摘要:临清坳陷晚古生代地层是胜利油田勘探的重要层位,研究其煤成气储层特征对该区油气资源勘探和能源接替有重要意义。以沉积学、岩石学和地层学为主要研究手段,在总结该区晚古生代沉积体系及沉积相基础上,分析了
2、山西组和石盒子组等地层中的砂岩储层物性特征。研究发现:该区主要存在四大沉积体系,即潮坪沉积体系、障壁一泻湖沉积体系、河控浅水三角洲沉积体系及河流湖泊复合沉积体系,其中,三角洲分流河道砂体、大型河流、湖泊及湖泊三角洲沉积砂体成为煤成气的有利储层;这些储层的岩石类型主要有长石砂岩、石英砂岩、岩屑砂岩及硬砂岩等,且石英砂岩以奎山段较发育,长石石英砂岩多发育于山西组。关键词:临清坳陷;煤成气;沉积体系;储层中图分类号:P618.11文献标识码:ADOI:10.3969~.issn.1001.1986.2010.04.002Stedimentologicalf
3、eatureofcoal-formedgasreservoirofLatePalaeozoicInLinqingdepressionHANMeilian,LUDawei,WANGFangz,JIAQiangz(1.DepartmentofResourcesandCivilEngineering,ShandongUniversityofScienceandTechnology,TalOn,271019,China;2.CollegeofGeologyScienceandEngineering,ShandongUniversityofScienceand
4、Technology,Qingdao266510,China)Abstract:ThestrataofLatePalaeozoicinLinqingdepressionareanimportantexplorationhorizonofShenglioil—field.Studiesonthereservoirofcoal-formedgaswillplayanimportantroleinoil—gasresourcesexplorationandthereplacementofenergy.Thispaperhastakenthesediment
5、ology,petrologyandstratigraphyasthemainresearchmeans.HavingsummarizedthesedimentarysystemsandsedimentaryfaciesofLatePalaeozoic,thepaperanalysedthephysicalcharacteristicsofthesandstonereservoirinShanxiFormation,ShiheziFormationandSOon.Studyshowedthattherearefoursedimentarysystem
6、s,thatis,thetidalflatsedimentarysystem,thebarrier-lagoonsedi—mentarysystem,theriVer.controllingshallowwaterdeltasedimentarysystemandtheriver-lakecompoundsedi-mentarysystem.Amongwhich,thedistributarychannelsandbodyofdelta,thesedimentarysandbodyinthelargeriver,lakeandlake—deltaar
7、ethefavorablereservoirofcoal—formedgas.Themainrocktypesofthereservoirarethefeldsparsandstone,quartzsandstone,lithicsandstoneandthehardsandstone.ThequartzsandstonesarequitedevelopedinKuishansection,andthefeldspar-quartzsandstonesarequitedevelopedinShanxiformation.Keywords:Linqin
8、gdepression;coal—formedgas;sedimentarysystem;reservoir
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